Dust-trap and ventilator.



No. 764,922. PATENTEDJULY 12, 1904. P. E. DAVIS. DUST TRAP ANDVENIILATOR.

APPLICATION FILED SEPT. 3. 1903.

N0 MODEL.

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' ATTORNEYS UNITED STATES Patented July 12, 1904.

-FRANK EVERETT DAVIS, OF ATCHISON, KANSAS.

DUST-TRAP AND VENTILATOR.

SPECIFICATION forming part of Letters Patent No. 764,922, dated July 12,1904.

Application filed September 3, 1903. Serial No. 171,784. (No model.)

1 0 all whom it may concern.-

Be it known that I, FRANK EVERETT DAvIs, a citizen of the United States,and a resident of Atchison, in the county of Atchison and State ofKansas, have invented a new and Innproved Dust-Trap and Ventilator, ofwhich the following is a full, clear, and exact description.

This invention relates to means for the warming and ventilation ofinclosures, and has for its object to provide a simple noveldustarresting trap for hot or cold air distributing pipes which willefiectively coact with any heating or cooling apparatus wherein conduitsfor heated or cold air, or both, are employed for conveying warm or coolair to and from rooms and prevent the intrusion of dust with theinducted air, a further object being to provide the improveddust-arresting apparatus with a foul-air conduit to remove vitiated airfrom rooms or other inclosed spaces.

The improvement is particularly well adapted for use with the tubularconduits of hot-airdistributing apparatus, and while it is to beunderstood that the improved dust-trap may be placed at any convenientpoint for arresting dust at each air-inlet to a room it may withadvantage be positioned at the junction of a cold-air pipe with thelower portion of a hot-air furnace, and to illustrate one application oftheimprovement it is shown as so applied in the accompanying drawings.

The invention consists in the novel construction and combination of theseveral parts, as

will be hereinafter fully set forth, and pointed out in the claim.

Reference is to be had to the accompanying drawings, forming a part ofthis specification, in which similar characters of reference indicatecorresponding parts in all the figures.

Figure 1 is a partly-sectional side view representing the improvement asapplied to and connected with the casing-wall of a hot-air furnace. Fig.2 is an enlarged partly-sectional side View of the improved dust-trap,taken substantially on the line 2 2 in Fig. 3; and Fig. 3 is a planView, partly in section, showing the interior of the trap.

The air-heating furnace A may be of any preferred construction, havingan air-space produced around the fire-chamber thereof by the casing-wallA, as usual.

Upon the lower portion of the casing-wall A a preferably rectangularcollar 5 is secured overa suitable opening therein, the free outerportion of the collar having a slidable engagement with the end portionof the metal body 6 of the trap.

The ttrap-body. 6 may with advantage be formed of plate or sheet metalthat is shaped to give it a rectangular contour and at one open side isslidably fitted upon or into the collar 5, as shown. The collar isinserted into the trap-body and contacts at its edge with a stop-flangea, that encircles the inner surface of the body near the edge thereof,which receives the end of the collar, as clearly shown in Fig. 1.

At the opposite side of the trap-body 6 an air-induction pipe 7 isattached thereto, preferably by means of a plate-metal flange 8, affixedto and projecting radially from the end of the pipe, the outer edge ofsaid fiange being cut to proper form and fitted into and secured withinthe body 6 near its edge, as indicated in Fig. 2.

Within the box-like body 6a set of perforate screens 9 1O 11 is held,said screens being spaced apart and held in place by projections 6,formed or secured upon the inner surface of the body 6, and to stiffenthe screens each is preferably held ina border-frame of plate-metal, asindicated ate in Fig. 2.

The screens 9 10 11 are formed of wire-cloth of difierent mesh orreticulation, the screen 9, which is positioned nearest to theinductionpipe 7, having the largest meshes, the screen 11 very finemeshes, and the middle-screen 1O meshes of a grade between thereticulations of the screens 9 and 11.

-- One side of the box-body 6 is provided with a removable wallconsisting of the slide-plate 6, having a loose engagement with thegrooved edges formed on the body 6 at each end of the same, thisremovable plate when partly or entirely displaced affording free accessto the interior of the trap-body 6 for the removal of dust or heavierimpurities that have been arrested by the screens 9 1O 11.

A bafiie-plate 6 may be employed to aid in arresting heavy particles ofdust or the like that have passed through the screen 10 and by theirgravity have been carried down toward the lower wall of the body 6. Thisbaffie-plate consists of a plate-metal strip atfixed by one side edge onthe lower wall of the trap-body 6 and thence inclined upward andslightly toward the middle screen 10, which adapts the bafiie-plate toprevent an eddy-current of air from agitating the dirt or dust that has.fallen upon the lower wall of the trap-body. If found desirable, asimilar baffle-plate may in a like manner be erected in an inclinedplane from the bottom wall of the trap-body 6, between the screen-walls9 and 10, to arrest heavy dirt that passes through the coarse screen 9.

In the bottom Wall of the trap-body 6 an opening (Z is formed, overwhich an outlet branch pipe 12 is secured by one end and thence isextended to a vertical draft-flue, such as a chimney, (not shown,) sothat the draft of the flue will remove odors or impure air from theair-supply inducted through the pipe 7.

In the arrangement of the dust-arresting and foul-air-removing apparatusas described it will be seen that the air supplied through theinduction-pipe 7 may be cold air from the exterior of thebuilding-whereinthe heatingfurnace is placed or the pipe may beextendedto cold apartments in the house to return the cold air therefrom to theheating device that may be in the lower portion of the building. Thedust-trap may also be employed, in connection with a register in thefloor or side wall of a room, to arrest dust carried with the upwardcurrent of heated air that is to pass through the register into theroom. In this case it will be obvious that the fine screen 11 anysuitable means be drawn or forced into a building for cooling the same.

As the form and proportions of the improved dust-trap and ventilator maybe changed without departure from the spirit of the invention I claimthe right to make such changes as fall within the scope of the claim.

Having thus described my invention, I claim as new and desire to secureby Letters Patent A dust-trap and ventilator, comprising a rectangularbox-body, open at one end and at one side, a. vertically-slidable gatethat normally closes the side opening, a plurality of screens removablyheld spaced apart and vertical by their sliding insertion between pairedprojections on the upper and lower walls of the box, said screens beinginsertible and removable through the side opening in the box, aninclined baflie-plate held by one edge on the bottom of the box betweentwo screens, to arrest dust that falls from the screens, a foul-airconduit opening into the bottom of the box for removal of heavy vitiatedair therefrom by natural draft, an air-induction pipe for supplying airto be screened and purified, and a source of heat through which thepurified air passes before entering a room for the ventilation thereof.

In testimony whereof I have signed my name to this specification in thepresenceof two subscribing witnesses.

FRANK EVERETT DAVIS.

Witnesses:

(JHAs. J. CoNLoN, H. C. WALCOTT.

